Charlottesville white nationalist rally: What we know about deadly crash

At least seven people are being treated at Sentara Martha Jefferson Hospital in Charlottesville, VA after a car drove into a crowd of protestors according to hospital spokeswoman Jen Downs. There is no word on their conditions, Downs says.

Shortly before the attack Saturday, fistfights and screaming matches erupted between counterprotesters and white nationalists protesting the removal of a confederate monument. The clashes led to the cancellation of scheduled protests, sending demonstrators from both sides marching on nearby streets. A few hours later, a car slammed into a throng of counterprotesters.

Here's what we know:

What happened?

Counterprotesters met white nationalists and other right-wing groups at the site of Saturday's event hours before the rally was set to start.

Clashes broke out and police began to disperse crowds.

Local officials declared the rally an "unlawful assembly" and Virginia Gov. McAuliffe declared a state of emergency to aid in the state's response to the violence.

The victims

A total of 19 others were also hurt, including five people still in critical condition Saturday, a spokeswoman for the University of Virginia Medical Center said.

Two Virginia State Patrol troopers died when a helicopter crashed in a wooded area near Charlottesville after monitoring Saturday's events. The pilot, Lt. H. Jay Cullen, 48, and Trooper Berke M.M. Bates, who would have turned 41 on Sunday, were killed. Authorities are investigating the cause of the crash.

City officials say at least 15 others were wounded in events associated with the scheduled rally.

The suspect

The driver, James Alex Fields Jr., 20, of Maumee, Ohio, is being held at a Virginia jail on suspicion of second-degree murder, malicious wounding and failure to stop in an accident that resulted in death, said Superintendent Martin Kumer with the Albermarle-Charlottesville County Regional Jail.

Fields' mother, Samantha Bloom, told CNN affiliate Toledo Blade, her son told her last week he was going to an "alt-right" rally, but she was not involved in his political views. CNN's attempt to reach Bloom were unsuccessful.

The Department of Justice and the Federal Bureau of Investigations have launched a civil rights investigation into the deadly crash.

Three other men were arrested Saturday. One of them faces a charge of carrying a concealed handgun and the other is charged disorderly conduct. The third man, originally from Virginia, was arrested on suspicion of assault and battery.